tldraw/state/commands/ungroup.ts
2021-06-19 18:22:46 +01:00

103 lines
2.9 KiB
TypeScript

import Command from './command'
import history from '../history'
import { Data, ShapeType } from 'types'
import {
getPage,
getSelectedShapes,
getShape,
setSelectedIds,
} from 'utils/utils'
import { current } from 'immer'
import { getShapeUtils } from 'lib/shape-utils'
export default function ungroupCommand(data: Data) {
const cData = current(data)
const { currentPageId } = cData
const selectedGroups = getSelectedShapes(cData)
.filter((shape) => shape.type === ShapeType.Group)
.sort((a, b) => a.childIndex - b.childIndex)
// Are all of the shapes already in the same group?
// - ungroup the shapes
// Otherwise...
// - remove the shapes from any existing group and add them to a new one
history.execute(
data,
new Command({
name: 'ungroup_shapes',
category: 'canvas',
do(data) {
const { shapes } = getPage(data)
// Remove shapes from old parents
for (const oldGroupShape of selectedGroups) {
const siblings = (
oldGroupShape.parentId === currentPageId
? Object.values(shapes).filter(
(shape) => shape.parentId === currentPageId
)
: shapes[oldGroupShape.parentId].children.map((id) => shapes[id])
).sort((a, b) => a.childIndex - b.childIndex)
const trueIndex = siblings.findIndex((s) => s.id === oldGroupShape.id)
let step: number
if (trueIndex === siblings.length - 1) {
step = 1
} else {
step =
(siblings[trueIndex + 1].childIndex - oldGroupShape.childIndex) /
(oldGroupShape.children.length + 1)
}
// Move shapes to page
oldGroupShape.children
.map((id) => shapes[id])
.forEach(({ id }, i) => {
const shape = shapes[id]
getShapeUtils(shape)
.setProperty(shape, 'parentId', oldGroupShape.parentId)
.setProperty(
shape,
'childIndex',
oldGroupShape.childIndex + step * i
)
})
setSelectedIds(data, oldGroupShape.children)
delete shapes[oldGroupShape.id]
}
},
undo(data) {
const { shapes } = getPage(data, currentPageId)
selectedGroups.forEach((group) => {
shapes[group.id] = group
group.children.forEach((id, i) => {
const shape = shapes[id]
getShapeUtils(shape)
.setProperty(shape, 'parentId', group.id)
.setProperty(shape, 'childIndex', i)
})
})
setSelectedIds(
data,
selectedGroups.map((g) => g.id)
)
},
})
)
}
function getShapeDepth(data: Data, id: string, depth = 0) {
if (id === data.currentPageId) {
return depth
}
return getShapeDepth(data, getShape(data, id).parentId, depth + 1)
}